1994459086 has 4 divisors (see below), whose sum is σ = 2991688632. Its totient is φ = 997229542.

The previous prime is 1994459009. The next prime is 1994459087. The reversal of 1994459086 is 6809544991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6809544991 = 15061 ⋅452131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994459087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498614770 + ... + 498614773.

It is an arithmetic number, because the mean of its divisors is an integer number (747922158).

Almost surely, 2^1994459086 is an apocalyptic number.

1994459086 is a deficient number, since it is larger than the sum of its proper divisors (997229546).

1994459086 is an equidigital number, since it uses as much as digits as its factorization.

1994459086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997229545.

The product of its (nonzero) digits is 2799360, while the sum is 55.

The square root of 1994459086 is about 44659.3672816801. The cubic root of 1994459086 is about 1258.7564547142.

The spelling of 1994459086 in words is "one billion, nine hundred ninety-four million, four hundred fifty-nine thousand, eighty-six".